TUBES, PIPES AND HOLLOW PROFILES, WELDED, OF NON-CIRCULAR CROSS-SECTION, OF IRON OR STEEL OTHER THAN STAINLESS STEEL (EXCL. TUBES AND PIPES HAVING INTERNAL AND EXTERNAL CIRCULAR CROSS-SECTIONS AND AN EXTERNAL DIAMETER OF > 406,4 MM, LINE PIPE OF A KIND US

TUBES, PIPES AND HOLLOW PROFILES, WELDED, OF NON-CIRCULAR CROSS-SECTION, OF IRON OR STEEL OTHER THAN STAINLESS STEEL (EXCL. TUBES AND PIPES HAVING INTERNAL AND EXTERNAL CIRCULAR CROSS-SECTIONS AND AN EXTERNAL DIAMETER OF > 406,4 MM, LINE PIPE OF A KIND US

TUBES, PIPES AND HOLLOW PROFILES, WELDED, OF NON-CIRCULAR CROSS-SECTION, OF IRON OR STEEL OTHER THAN STAINLESS STEEL (EXCL. TUBES AND PIPES HAVING INTERNAL AND EXTERNAL CIRCULAR CROSS-SECTIONS AND AN EXTERNAL DIAMETER OF > 406,4 MM, LINE PIPE OF A KIND US

TUBES, PIPES AND HOLLOW PROFILES, WELDED, OF NON-CIRCULAR CROSS-SECTION, OF IRON OR STEEL OTHER THAN STAINLESS STEEL (EXCL. TUBES AND PIPES HAVING INTERNAL AND EXTERNAL CIRCULAR CROSS-SECTIONS AND AN EXTERNAL DIAMETER OF > 406,4 MM, LINE PIPE OF A KIND US

TUBES, PIPES AND HOLLOW PROFILES, WELDED, OF NON-CIRCULAR CROSS-SECTION, OF IRON OR STEEL OTHER THAN STAINLESS STEEL (EXCL. TUBES AND PIPES HAVING INTERNAL AND EXTERNAL CIRCULAR CROSS-SECTIONS AND AN EXTERNAL DIAMETER OF > 406,4 MM, LINE PIPE OF A KIND US